马尾松桐棉种源优树子代遗传测定与选择

doi:10.16088/j.issn.1001-6600.2022050604

Abstract

Abstract: With the large-scale reduction of the natural forest of tungmian provenance of Pinus massoniana, as well as the increase in the degree of selection and the reduction in genetic diversity. It is necessary to carry out research on the genetic variation of the growth traits of the progeny of P. massoniana from tungmian provenance, and to provide reference for the protection and genetic improvement of the natural population of P. massoniana from Tungmian provenance. Using 74 half-sib families of tungmian provenance of P. massoniana as materials, the growth traits such as diameter at breast height and tree height were determined and genetic variation analysis was carried out, and the principal coordinate dimensionality reduction analysis method was combined with genetic gain analysis to screen excellent families and individual plants. The results showed that the growth traits (diameter at breast height, tree height and volume per plant) were significantly differentiated and significantly different among families of tungmian provenance of P. massoniana (P<0.05). The order of family heritability was volume per plant (0.224 5) > diameter at breast height (0.107 5) > Tree height (0.091 0). Principal coordinate analysis showed that 8 excellent families were screened out and the genetic gains of each trait were 1.42%, 0.71%, and 6.68%. Twenty-three excellent individual plants were screened from 8 excellent families and their genetic gains of each trait were 5.50%, 1.88% and 29.15%, and the selection effect was significant. In conclusion, there was great breeding potential among families of superior growth traits of the progeny tungmian Provenance of P. massoniana. The selected excellent families and individual plants could provide excellent germplasm data for the protection and genetic improvement of the natural population of tungmian provenance of P. massoniana.

Key words: Pinus massoniana, genetic analysis, growth trait, half-sib families, progeny determination

CLC Number: S791.248;S722

LI Peng, WEI Wenchu, QIU Hui, YANG Zhangqi, CHEN Hu, QIU Chengxiang, LI Yuanming, LONG Zhenyun, WU Dongshan. Genetic Determination and Selection of Progeny Tungmian Provenance of Pinus massoniana[J].Journal of Guangxi Normal University(Natural Science Edition), 2023, 41(3): 182-190.

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Genetic Determination and Selection of Progeny Tungmian Provenance of Pinus massoniana

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